alt Hacker News> In Iran, some 90 percent of the water abstracted from rivers and underground aquifers is taken for agriculture.
It's quite something they are envisioning a 100 billion dollar project to move the capital instead of limiting water waste in desert agriculture and closing Tehran's water loop by reclaiming sewage, greatly reducing the net demand: https://www.youtube.com/watch?v=WhCNpX3s-D8
Closed loop municipal water systems seem like such a good idea that just needs a little kickstart to become relatively self-sustaining from harvesting what is otherwise treated as waste.
https://www.sciencedirect.com/science/article/pii/S194439862...